The act of "sniping" a quote, i.e taking a sentence or sentences and replying to them individually.
While not being quote mining per se, quote sniping is regarded as a nefarious thing to do while arguing on online forums.
Person 1: Do you agree about X?
Person 2: Yes, because it's a valid arguement.
Person 1: First of all, it's "argument". Silent e's disappear when suffixes are added. Secondly, outright denying blatantly true facts is not a valid argument.
quote sniping at its finest.